I found there ___two pieces of paper on the table

题目

I found there ___two pieces of paper on the table
was还是were?
paper不可数啊,为什么答案是were
难道说类似的句子Two bottles of orange (are) on the table ?

答案

were
有量词pieces就可以是复数
再说了
Two bottles of orange
没有用bottle说橘子的
但你可以说 two baskets of oranges are